Download JNTUH MCA 4th Sem R13 2019 December 814AT Information Security Question Paper

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Code No: 814AT

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

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Note: This question paper contains two parts A and B.
Part A is compulsory which carries 20 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 8 marks and may have a, b, c as sub questions.

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PART - A 5 x 4 Marks =20

1. Explain different kinds of security approaches. 4
2. Describes the Diffie- Hellman key exchange technique. 4
3. Discuss the techniques of public key certificates for distribution of public keys. 4
4. Compare and contrast the key management in PGP and S/MIME. 4

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5. Explain the operation of secure socket layer in detail. 4

PART -B 5 x 8 Marks =40

1. a) Consider the following:
   Plaintext: “KEY”
   Secret key: “CRYPTOGRAPHY”
   

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   Compute the cipher text from given plain text and key using hill cipher method.
   b) Give an overview of various security services. [4+4]

   OR

   Explain symmetric and asymmetric key cryptography. [8]
2. Apply the mathematical foundations of RSA algorithm. Perform encryption decryption for the following data, p=17, q=7, e=5, n=119, message = “6”. Use extended Euclid's algorithm to find the private key. [8]

   OR

   a) With a neat diagram; explain about the multiple encryptions (Triple DES with two and three keys).
   

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   b) Briefly explain RC4 algorithm. [4+4]
3. Describe digital signature algorithm and show how signing and verification is done using DSS. [8]

   OR

   a) X.509 includes three alternative authentication procedures, what are these three procedures? Explain them in brief.
   b) Explain in detail about MAC algorithms and its requirements. [4+4]
4. What do you mean by Security Association? Specify the parameters that identify the Security Association.
   

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   Summarize about the authentication header of IP and discuss about encapsulating security payload of IP. [4+4]

   OR

   a) Explain the general format of Pretty Good Privacy Message.
   b) Discuss the architecture of IP security. [4+4]
5. Explain the different types of firewalls with neat diagrams. [8]

   OR

   a) List and explain the major classes of intruders.
   

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   b) Describe Secure Electronic Transaction for E- Commerce transaction with neat diagram. [4+4]

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